Peeing in swimming pools is considered normal by athletes and before 2012 London Olympics, Michael Phelps and Ryan Lochte admitted that peeing in swimming pools in acceptable behavior.

Scientists have discovered a new way to track this disgusting habit which involves measuring how sweet the water is.

They published their study in the journal Environmental Science & Letters.

"Recent studies have shown that nitrogenous compounds (e.g., urea) in urine and sweat react with chlorine to form disinfection byproducts (DBPs), including trichloramine, that can cause eye irritation and respiratory problems", the statement reads.

"Even though no one would admit to peeing in a pool, obviously somebody has to be doing it", said one of the researchers, Lindsay Blackstock, a PhD student of analytical and environmental toxicology at Alberta University.

Now scientists have been able to confirm the full extent of offending for the first time, after developing a test created to estimate how much urine has been covertly added to a large volume of water. We found ACE was present in 100 percent of the pools and hot tubs we sampled.

Acesulframe potassium (ACE), an artificial sweetener added commonly to processed foods, passes out of our body unchanged. An Olympics swimming pool contains almost 220,000-gallon and there is 20 gallon of human urine in that water, as per the research team estimates. In fact, said concentrations were 570 times greater than those researchers would normally see in tap water.

The paper's abstract is below. There's not enough evidence to say whether the nitrosamine levels in pools increase cancer risk, Blatchley says, but one study in Spain did find more bladder cancers in some long-term swimmers.

Using these results, the scientists approximated the amount of human urine present in an average swimming pool.

If you ever found yourself wondering about how much urine is there in a public pool, then you will be absolutely thrilled to find out that a team of Canadian researchers asked the same question and actually got their answer. The news of an overnight water colour change in the 2016 Rio Olympic pools made buzz and puts the spotlight on the need to monitor water quality.